makefile if variable equals
A conditional causes part of a makefile to be obeyed or ignored depending on the values of variables. Conditionals can compare the value of one variable to ... ,A conditional causes part of a makefile to be obeyed or ignored depending on the values of variables. Conditionals can compare the value of one variable to ... , The thing that is odd about GNUmake conditionals is that there is no boolean type in make -- everything is a string. So the conditionals all work ...,GNU make: Conditional Syntax. ... The syntax of a simple conditional with no else is as follows: ... Often you want to test if a variable has a non-empty value. , There are several problems here, so I'll start with my usual high-level advice: Start small and simple, add complexity a little at a time, test at ..., $(if ...) conditional function evaluates to true when the first argument passed to ... They can't be used inside variable definition and in functions., conditional-directive text-if-true else text-if-false endif ... If Equal Syntax ... For each whitespace separated word in "list", the variable named by ..., Any elegant solution to set the variable if empty? GNU make is hardly known for elegant solutions. Unless you find trapdoors and minefields to ..., However, if you, like me, want to use greater-than comparison in order to then set a make variable via make 's $(eval) command, then you will ...,The ifeq() directive has to be in column 1, remove any leading whitespace ie test_target: ifeq ($(TEST),"TRUE") echo "Do something" endif. ^ no whitespace.
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 makefile if variable equals 相關參考資料
GNU make - Conditional Parts of Makefiles
A conditional causes part of a makefile to be obeyed or ignored depending on the values of variables. Conditionals can compare the value of one variable to ... ftp://ftp.gnu.org GNU Make - Conditional Parts of Makefiles - MIT
A conditional causes part of a makefile to be obeyed or ignored depending on the values of variables. Conditionals can compare the value of one variable to ... http://web.mit.edu gnu make - How to check if a variable is equal to one of two ...
The thing that is odd about GNUmake conditionals is that there is no boolean type in make -- everything is a string. So the conditionals all work ... https://stackoverflow.com GNU make: Conditional Syntax
GNU make: Conditional Syntax. ... The syntax of a simple conditional with no else is as follows: ... Often you want to test if a variable has a non-empty value. https://www.gnu.org if statement - If conditions in a Makefile, inside a target ...
There are several problems here, so I'll start with my usual high-level advice: Start small and simple, add complexity a little at a time, test at ... https://stackoverflow.com makefile - GNU make conditional function $(if ...) inside a user ...
$(if ...) conditional function evaluates to true when the first argument passed to ... They can't be used inside variable definition and in functions. https://stackoverflow.com Makefile If-Then Else and Loops - Stack Overflow
conditional-directive text-if-true else text-if-false endif ... If Equal Syntax ... For each whitespace separated word in "list", the variable named by ... https://stackoverflow.com Makefile set if variable is empty - Stack Overflow
Any elegant solution to set the variable if empty? GNU make is hardly known for elegant solutions. Unless you find trapdoors and minefields to ... https://stackoverflow.com Performing greater-than less-than calculations in a Makefile ...
However, if you, like me, want to use greater-than comparison in order to then set a make variable via make 's $(eval) command, then you will ... https://stackoverflow.com shell - Checking environment variables' value in Makefile - Unix ...
The ifeq() directive has to be in column 1, remove any leading whitespace ie test_target: ifeq ($(TEST),"TRUE") echo "Do something" endif. ^ no whitespace. https://unix.stackexchange.com |